Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications16 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 7321 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 225 mm |
| Width | B | 49 mm |
| Basic dynamic load rating | C | 225 kN |
| Basic static load rating | C0 | 214 kN |
| Fatigue load limit | Pu | 11.5 kN |
| Reference speed | nref | 3400 r/min |
| Limiting speed | nG | 5100 r/min |
| Mass | ≈m | 9.298 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Sealing | Without — Not sealed | |
| Cage | MP — Solid brass cage, ball guided | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 150 °C |
Precision classification2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial ball bearing tolerance equivalent | ABEC 1Derived from ISO Normal; not a direct ABEC marking | |
| Mapping basis | ISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value. |
Product characteristics7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Design variant | B | |
| Type of Seal | Without | Not sealed |
| Cage | MP | Solid brass cage, ball guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | S0 | Rings dimensional stabilized up to 150° |
| Bearing with matched conditions for fitting in pairs | UA | Bearing set with small axial internal clearance |
| Lubricant | Without | Bearing not greased |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 225 mm8.858 in |
| Width | B | 49 mm1.929 in |
| Basic dynamic load rating, radial | Cr | 225,000 N50,584.532 lbf |
| Basic static load rating, radial | C0r | 214,000 N48,111.511 lbf |
| Fatigue load limit, radial | Cur | 11,500 N2,585.432 lbf |
| Limiting speed | nG | 5,100 1/min |
| Reference speed | nϑr | 3,400 1/min |
| Mass | ≈m | 9.298 kg20.499 lbs |
Mounting dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter of shaft shoulder | da min | 119 mm4.685 in |
| Maximum diameter of housing shoulder | Da max | 211 mm8.307 in |
| Maximum diameter of housing shoulder | Db max | 218 mm8.583 in |
| Maximum fillet radius of shaft | ra max | 2.5 mm0.098 in |
| Maximum fillet radius of housing | ra1 max | 1 mm0.039 in |
Dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 3 mm0.118 in |
| Minimum chamfer dimension | r1 min | 1.1 mm0.043 in |
| Shoulder diameter on outer ring wide side face | D1 | 178.9 mm7.043 in |
| Shoulder diameter on inner ring wide side face | d1 | 154 mm6.063 in |
| Distance between the apexes of the pressure cones | a | 93.7 mm3.689 in |
| Contact angle | α | 40 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 150 °C302 °F |
Capabilities & suitability5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes |
Manufacturer Identity10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 359984 | |
| Brand | FAG | |
| Base Type | 7321 | |
| Old Designation | ["7321B.MP.UA","7321-B-MP-UA"] | |
| X Life Marking | XL | |
| SAP material number | 0191183170000 | |
| Base product | 2305080301 | |
| Bearing X designation | 7321-B-XL-MP-UA | |
| Mounting Manager ID | 7321-B-XL-MP-UA | |
| Grease application ID | 7321-B-XL-MP-UA |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Angular contact ball bearing 73..-B-XL-MP, single row, X-life, solid brass cage | |
| Short Description | Angular contact ball bearing |
Additional information2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance for axial clearance or preload per set | Tol(+) | 12 µm0.00047 in |
| Axial clearance per set min. | Amin | 58 mm2.283 in |
Technical Data22 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 225 mm | |
| Width (B) | 49 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 225,000 N | |
| Basic Static Load Rating, Radial (C0R) | 214,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 5,100 1/min | |
| Operating Temperature Max. (Tmax) | 150 °C | |
| Reference Speed (Nϑr) | 3,400 1/min | |
| Maximum Diameter Of Housing Shoulder (Db Max) | 218 mm | |
| Tolerance For Axial Clearance Or Preload Per Set (Tol(+)) | 12 µm | |
| Fatigue Load Limit, Radial (Cur) | 11,500 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 119 mm | |
| Shoulder Diameter Inner Ring (D1) | 154 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 211 mm | |
| Minimum Chamfer Dimension (Rmin) | 3 mm | |
| Maximum Fillet Radius (Ra Max) | 2.5 mm | |
| Maximum Recess Radius (Ra1 Max) | 1 mm | |
| Shoulder Diameter Outer Ring (D1) | 178.9 mm | |
| Minimum Chamfer Dimension (R1 Min) | 1.1 mm | |
| Contact Angle (Α) | 40 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 93.7 mm |